Detail of GB 50229-2019

Introduction of GB 50229-2019

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. According to the requirements of Document JIANBIAO [2011] No.17 issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China - Notice on printing and distributing the development and revision plan on engineering construction standards in 2011, the drafting group has revised the former coder through extensive investigation and study, careful summarization of practical experience, and reference to relevant international and foreign advanced standards and on the basis of widely soliciting for opinions. This standard consists of 11 clauses, mainly including: general requirements; terms; fire hazard classifications, fire resistance classification and fire compartment of buildings (structures) of coal-fired power plant; general plane layout of coal-fired power plant area; safe evacuation and structure of buildings (structures) of coal-fired power plant; process system of coal-fired power plant; fire water supply, extinguishing facilities and automatic fire alarm of coal-fired power plant; heating, ventilation and air conditioning of coal-fired power plant; fire power supply and lighting of coal-fired power plant; gas turbine power plant; and substation. The following main contents have been revised: 1. The application scope of the code is adjusted; 2. The fire hazard and fire resistance classification of buildings (structures), the fire prevention measures for key parts in the main power house, the fire resistance of building elements of coal transit system, the fire prevention measures for denitration system, the safe evacuation from buildings, the explosion internal pressure of pulverized coal bunker, the selection and laying of fire cables and power cables, the selection, technical parameters and selection scope of fire fighting, detection and alarm, smoke control and exhaust, evacuation signs and emergency lighting systems of various buildings, etc. are revised and improved; 3. The building types of substation are adjusted and supplemented. The fire protection requirements of underground substation and unattended substation, the fire water consumption in buildings and the setting requirements of automatic fire alarm system are added. The provisions printed in bold type in this standard are compulsory and must be enforced strictly. The Ministry of Housing and Urban-Rural Development is in charge of the administration of this standard and the explanation of the compulsory provisions, the Fire Department of Ministry of Public Security and China Electricity Council are responsible for the routine management, and Northeast Electric Power Design Institute Co., Ltd. is responsible for the explanation of specific technical contents. During the process of implementing this standard, the relevant opinions and advices, whenever necessary, can be posted or passed on to Northeast Electric Power Design Institute Co., Ltd. (Address: No.4368, Renmin Street, Changchun City, 130021, China). Contents 1 General provisions 1 2 Terms 2 3 Fire hazard classifications, fire resistance classification and fire compartment of buildings (structures) of coal-fired power plant 4 4 General plane layout of coal-fired power plant area 8 5 Safe evacuation and structure of buildings (structures) of coal-fired power plant 12 5.1 Safe evacuation from main power house 12 5.2 Safe evacuation from other buildings (structures) 12 5.3 Building structure 13 6 Process system of coal-fired power plant 17 6.1 Coal transit system 17 6.2 Boiler pulverized coal system 18 6.3 Boiler air and flue gas system 22 6.4 Fuel oil system for ignition and combustion-supporting 23 6.5 Steam turbine generator unit 25 6.6 Diesel-generator system 28 6.7 Transformer and other electrical equipment with oil 28 6.8 Cable and cable laying 29 7 Fire water supply, extinguishing facilities and automatic fire alarm of coal-fired power plant 32 7.1 General requirements 32 7.2 Outdoor fire water supply 38 7.3 Indoor fire hydrant and indoor fire water supply volume 40 7.4 Indoor fire water pipe, hydrant and fire water tank 41 7.5 Water spray, water mist, automatic sprinkling and fixed fire monitor extinguishing system 43 7.6 Fire pump house and fire-fighting pool 45 7.7 Fire water drainage 46 7.8 Foam extinguishing system 47 7.9 Gas fire extinguishing system 47 7.10 Gas inerting system 47 7.11 Fire extinguisher 48 7.12 Fire fighting and rescue facilities 50 7.13 Automatic fire alarm and fire equipment control 50 8 Heating, ventilation and air conditioning of coal-fired power plant 52 8.1 Heating 52 8.2 Air conditioning 52 8.3 Ventilation for electronic equipment room 53 8.4 Oil system ventilation 54 8.5 Ventilation and de-dusting of coal transit system 55 8.6 Ventilation of other buildings 56 8.7 Smoke control and exhaust system 56 9 Fire power supply and lighting of coal-fired power plant 58 9.1 Fire power supply 58 9.2 Lighting 59 10 Gas turbine power plant 62 10.1 Fire hazard classifications and fire resistance classification of buildings (structures) 62 10.2 General layout of plant area 63 10.3 Fuel system 64 10.4 Fire protection requirements for gas turbine 65 10.5 Fire water supply, fixed fire extinguishing facilities and automatic fire alarm 65 10.6 Others 66 11 Substation 68 11.1 Fire hazard classification and fire resistance classifications, fire separation distance and firefighting roads of buildings (structures) 68 11.2 Safe evacuation and construction of buildings (structures) 73 11.3 Transformer and other electrical equipment with oil 74 11.4 Cable and cable laying 75 11.5 Fire water supply, fire extinguishing facilities and automatic fire alarm 76 11.6 Heating, ventilation and air conditioning 82 11.7 Fire power supply and emergency lighting 82 Explanation of wording in this standard 85 List of quoted standards 86 1 General provisions 1.0.1 This standard is formulated with a view to ensuring the fire safety of fossil fuel power plants and substations, preventing fires or reducing fire hazards, and ensuring personal and property safety. 1.0.2 This standard is applicable to the following constructed, renovated and extended fossil fuel power plants and substations: 1 Coal-fired power plants with 1,000MW and below units (hereinafter referred to as "coal-fired power plants"); 2 Simple-cycle or gas-steam combined cycle power plants with standard rated output of 400MW and below of gas turbine (hereinafter referred to as "gas turbine power plants"); 3 Substations and converter stations with voltage of 1,000kV and below. 1.0.3 The design of fire protection for fossil fuel power plants and substations shall actively use new technologies, new processes, new materials and new equipment to achieve safety and serviceability, technical advancement and economic rationality in combination with the specific conditions of the project. 1.0.4 In addition to this standard, the design of fire protection for fossil fuel power plants and substations shall also comply with those stipulated in the current relevant standards of the nation.   2 Terms 2.0.1 main power house the main power house of coal-fired power plant refers to a plant building consisting of steam turbine room, central control building (turbine-boiler control room), deaerator bay, coal bunker bay, boiler house, etc. the main power house of gas turbine power plant refers to a plant building consisting of gas turbine room, steam turbine room, central control room, heat recovery steam generator, etc. 2.0.2 central control building a plant building in a fossil fuel power plant that centrally controls two or more units and auxiliary systems, including central control room, electronic equipment room, cable interlayer, battery room, shift room, auxiliary rooms, etc. 2.0.3 electrical control building a building in a fossil fuel power plant that centrally controls the main electrical systems under the non-unit control mode, or a building in a substation that centrally controls the main electrical systems and equipment, which generally consists of the main control room, electronic equipment room, cable interlayer, battery room, shift room, auxiliary rooms, etc. 2.0.4 network control building a building in a fossil fuel power plant that independently controls the power network system or equipment of a booster station, which, usually an unattended building, generally consists of electronic equipment room, battery room, auxiliary rooms, etc. 2.0.5 switchgear control building a building in a fossil fuel power plant that controls the main electrical equipment of the main switch station and auxiliary switch station 2.0.6 power distribution building a building in a fossil fuel power plant that receives, distributes and controls electric energy, which generally consists of indoor power distribution unit room, high- and low-voltage power distribution rooms, etc. 2.0.7 special warehouse warehouse for storing cylinders that contain lubricating oil and hydrogen, oxygen, acetylene or other gases 2.0.8 general warehouse warehouse for storing precision instruments, steels and general equipment, including general equipment warehouse, precision equipment warehouse, steel warehouse, auxiliary room, etc. 2.0.9 indoor coal yard coal storage building with fully closed roof and envelop enclosure, including circular coal yard and strip coal yard 2.0.10 liquid ammonia area areas where liquid ammonia is unloaded, stored and prepared when liquid ammonia is used as denitration reductant, including power distribution room, ammonia unloading compressor, liquid ammonia storage tank, liquid ammonia evaporator, ammonia buffer tank, ammonia dilution tank, waste water pool and waste water delivery pump, pipeline, valve, etc. 2.0.11 valve hall building equipped with converter valves. A valve hall is usually equipped with the converter valves of one pole and the related equipment   3 Fire hazard classifications, fire resistance classification and fire compartment of buildings (structures) of coal-fired power plant 3.0.1 The fire hazards of production shall be classified according to factors such as the nature and quantity of substances used or generated in production, while the fire hazards of stored articles shall be classified according to factors such as the nature of stored articles and the content of combustible substances in stored articles, and all of them shall be in accordance with those specified in Table 3.0.1. Table 3.0.1 Fire hazard classifications and fire resistance classification of buildings (structures) Name of building (structure) Fire hazard classification Fire resistance classification Main power house (steam turbine house, deaerator bay, central control building, coal bunker bay and boiler house) D Class II Suction fan room D Class II Dust collection structure D Class II Chimney D Class II Air cooling platform E Class II Desulfurization process building, limestone pulping building, limestone milling building and gypsum warehouse E Class II Desulfurization control building D Class II Absorption tower E Class III Booster fan room E Class II Indoor coal unloading unit C Class II Coal crusher room, coal conveying transfer station and coal blending building C Class II Closed coal transport trestle and coal transport tunnel C Class II Silo, dry coal shed, thawing room and indoor coal yard C Class II Non-combustible material conveying transfer station E Class II Non-combustible material conveying trestle E Class II Oil supply/discharge pump house and trestle (diesel oil, heavy oil and residual oil) C Class II Oil treatment room C Class II Electrical control building, network control building, microwave building and switchgear control building C Class I Indoor power distribution building (containing equipment with oil filling capacity > 60kg each) C Class II Indoor power distribution building (containing equipment with oil filling capacity ≤60kg each) D Class II Oil-immersed transformer room C Class I Bank side pump house and circulating water pump house E Class II Slurry and ash pump house E Class II Ash storage E Class III Domestic water and fire pump house and integrated water pump house E Class II Stabilizer room and dosing equipment room E Class II Water intake building (structure) E Class II Cooling tower E Class III Chemical water treatment room and circulating water treatment room E Class II Hydrogen supply (generation) station A Class II Start-up boiler house D Class II Air compressor room (screw type without lubricating oil or oil injection) E Class II Air compressor room (with lubricating oil) D Class II Thermal, electrical and metal laboratories D Class II Overpass E Class II Transformer overhaul room C Class II Rainwater and sewage (waste water) pump house E Class II Overhaul workshop E Class II Sewage (waste water) treatment structure E Class II Water supply treatment structure E Class II Cable tunnel C Class II Diesel generator room C Class II Ammonia area control room D Class II Ammonia unloading compressor room B Class II Liquid ammonia gasification room B Class II Special warehouse C Class II General warehouse E Class II Material shed E Class II Coal bulldozer house D Class II Note: When the special warehouse stores the cylinders that contain hydrogen, oxygen, acetylene or other gases, its fire hazard shall be determined according to the articles with higher level of fire hazard. 3.0.2 The combustion performance and fire resistance rating of building elements of power plants shall comply with the relevant requirements of the current national standard GB 50016 Code for fire protection design of buildings. The boiler house of the main power house may be built with metal load-bearing elements without fire protection. 3.0.3 The maximum allowable building area of fire compartment in the aboveground part of the main power house shall meet the following requirements: 1 In case of 600MW and below units, it shall not be greater than the building area of 6 units; 2 In case of units above 600MW and 1,000MW units, it shall not be greater than the building area of 4 units; 3 In the underground part, it shall not be greater than the building area of 1 unit. 3.0.4 When the underground part of the indoor coal unloading unit is connected with the underground transfer station or coal transport tunnel, the maximum allowable building area of the fire compartment shall not be greater than 3,000m2. 3.0.5 The maximum allowable occupied area of each indoor coal yard shall not be greater than 50,000m2. The area of each fire compartment should not be greater than 12,000m2, or otherwise the fire compartments shall be separated by a channel with a width of not less than 10m or a fire-proof wall that is 3m higher than the surface height of the coal pile. 3.0.6 For the main power house and coal transport trestle whose load-bearing elements are non-combustible components, when their non-load-bearing exterior walls are non-combustible components, their fire resistance rating is unlimited; when their non-load-bearing exterior walls are difficult-combustible components, their fire resistance rating shall not be less than 0.50h. 3.0.7 Partition wall made of non-combustible components shall be set between deaerator bay and coal bunker bay or boiler house. Partition wall made of non-combustible components shall be set between steam turbine room and combined deaerator and coal bunker bay or boiler house. The fire resistance rating of these partition walls shall not be less than 1.00h. 3.0.8 For central control room, main control room, network control room, steam turbine control room, boiler control room and computer room, their ceilings and wall surfaces shall be decorated with Class A decoration materials, and other parts with decoration materials not lower than Class B1. 3.0.9 The interior wall of cable interlayer in the building of power plant shall be made of non-combustible components with a fire resistance rating of not less than 1.00h. 3.0.10 The envelop enclosures of enclosed trestle, transfer station and other coal transport buildings shall be made of incombustible materials. When no automatic fire extinguishing system is set, fire protection measures shall be taken for their steel structures. 3.0.11 When the indoor coal yard is of steel structure, it shall meet the following requirements: 1 Fire protection measures shall be taken for the load-bearing elements of steel structure within a range of 3m or less from the coal pile surface, and the fire resistance rating shall not be less than 2.50h; 2 Heat insulation measures shall be taken for the concrete retaining wall in contact with coal under the surface of coal pile. 3.0.12 The number of floors and the maximum allowable building area of fire compartments of other plant buildings shall comply with the relevant requirements of the current national standard GB 50016 Code for fire protection design of buildings.   4 General plane layout of coal-fired power plant area 4.0.1 The plant area shall be divided into key fire prevention areas. The division of key fire prevention areas and the main buildings (structures) in these areas should be in accordance with those specified in Table 4.0.1. Table 4.0.1 Key fire prevention areas and main buildings (structures) in the areas Key fire prevention area Main buildings (structures) in the area Main power house area Main power house, dust collector, suction fan room, chimney, desulfurization device, and various oil-immersed transformers near steam turbine room Power distribution unit area Electrical equipment with oil for power distribution unit, network control building or switchgear control building Ignition tank area Oil supply/discharge pump house, oil storage tank and oily sewage treatment station Coal yard area Coal yard, transfer station, coal unloading device, coal transport tunnel, coal transport trestle and silo Hydrogen supply (generation) station area Hydrogen production room and hydrogen tank Liquid ammonia area Liquid ammonia storage tank and power distribution room Fire pump house area Fire pump house and reservoir Material warehouse area General warehouse, special warehouse and material shed 4.0.2 Fire separation measures shall be taken for cable trench (cable tunnel), coal transport trestle, coal transport tunnel and oil pipe trench between key fire prevention areas. 4.0.3 Circular fire lanes shall be set up around the main power house, ignition tank area, liquid ammonia area and coal yard, and fire lanes should be set up around other key fire prevention areas. For units with a capacity per unit of 300MW or above, a single lane shall be set up between the back of the boiler and the dust collector. Traffic roads may be used as fire lanes. When it is difficult to set up circular fire lanes around the main power house, ignition tank area, liquid ammonia area and coal yard of coal-fired power plants in mountainous areas and expanded coal-fired power plants, the end-type fire lanes may be set up along the long sides, and the turning lanes or turnarounds shall be set up. The area of the turnaround shall not be less than 12m×12m; for the purpose of use by large fire trucks, its area shall not be less than 18m×18m. 4.0.4 At least one fire truck climbing operation site shall be arranged at the fixed end and the expansion end of the main power house, and one fire truck climbing operation site shall be arranged between every two units outside the long side wall of the steam turbine room. For other buildings in the plant with a building height of greater than 24m, the fire truck climbing operation site shall be arranged along at least one long side, or the bottom edge of 1/4 of the peripheral length and not less than one long side length. The length and width of the fire truck climbing operation site shall not be less than 15m and 10m, respectively. 4.0.5 The clear width of fire lane shall not be less than 4.0m and the slope should not be greater than 8%. In case of obstacles such as pipe racks and trestles over the road, the clear height of fire lane should not be less than 5.0m, and shall not be less than 4.5m in difficult areas. 4.0.6 There shall be no less than two entrances and exits in the plant area, and their positions shall be convenient for fire trucks to enter and exit. 4.0.7 The distance between buildings (structures) inside the plant area fence and other buildings (structures) outside the fence shall comply with the relevant requirements of the current national standard GB 50016 Code for fire protection design of buildings. 4.0.8 The layout of fire station shall meet the following requirements: 1 The fire station shall be arranged in a moderate position in the plant area, avoiding the main pedestrian roads, so as to ensure that the fire trucks can reach the fire scene conveniently and quickly; 2 The main entrance of the garage of fire station shall face the road in plant area, and should not be less than 15.0m away from the edge of the road. 4.0.9 The distance from oil-immersed transformer to steam turbine room, indoor power distribution building, electrical control building, central control building and network control building shall not be less than 10m; when meeting the requirements of 5.3.10, the distance may be appropriately reduced. 4.0.10 When the plant area is arranged vertically in a stepped manner, the combustible liquid storage tank area should not be adjacently arranged on the steps higher than the important facilities or staff concentration areas of the whole plant. When it is really necessary to adjacently arrange it on the steps higher than the above places, measures shall be taken to prevent the spread of fire and the dispersion of combustible liquid. 4.0.11 The layout of ignition tank area shall meet the following requirements: 1 It shall be arranged separately; 2 The ignition tank area shall be surrounded by a 1.8m-high fence; when the plant area fence is used as the fence for the ignition tank area, the plant area fence of this section shall be a 2.5m-high solid fence; 3 The design of ignition tank area shall meet the relevant requirements of the current national standard GB 50074 Code for design of oil depot. 4.0.12 The layout of hydrogen generation station and hydrogen supply station shall meet the following requirements: 1 They should be arranged as independent buildings (structures); 2 They shall be surrounded by non-combustible solid fence with a height of not less than 2.5m; 3 The design of hydrogen generation station and hydrogen supply station shall meet the relevant requirements of the current national standard GB 50177 Design code for hydrogen station. 4.0.13 The layout of liquid ammonia area shall meet the following requirements: 1 The liquid ammonia area shall be separately arranged at the edge of the plant area with good ventilation conditions, avoiding the staff concentration areas and the main people flow entrances/exits; and it should be located on the windward side of the annual minimum frequency wind direction in the plant area; 2 The liquid ammonia area shall be surrounded by a non-combustible solid fence with a height of not less than 2.2m; when the plant area fence is used as the fence for the liquid ammonia area, the plant area fence of this section shall be non-combustible solid fence with a height of not less than 2.5m; 3 The liquid ammonia storage tank shall be provided with fire dike, and the arrangement of fire dike shall meet the relevant requirements of the current national standards GB 50016 Code for fire protection design of buildings and GB 50351 Code for design of fire-dike in storage tank farm. 4.0.14 The generic layout of pipelines and power lines in the plant area shall meet the following requirements: 1 Classes I, II and III liquid pipelines and combustible gas pipelines should be laid overhead; the pipelines laid along the ground or on low supports shall not hinder the passage of fire trucks; 2 Classes I, II and III liquid pipelines and combustible gas pipelines shall not pass through unrelated buildings, structures, production devices and storage tank areas; 3 The overhead power lines shall not cross the roofs built of combustible materials, Categories A and B buildings (structures), Classes I, II and III liquid storage tank areas or combustible gas storage tank areas.   4.0.15 The fire separation distance between buildings (structures) and equipment in the plant area shall not be less than those specified in Table 4.0.15 (see the insert at the end of the book); and the fire separation distance between high-rise plant buildings and other plant buildings in the plant area shall be increased by 3m on the basis of those specified in Table 4.0.15. 4.0.16 The fire separation distance between Categories A and B plant buildings and important public buildings should not be less than 50m. 4.0.17 When the same main power house is arranged in rectangular shape or E shape, the fire separation distance between two adjacent wings shall comply with the relevant requirements of the current national standard GB 50016 Code for fire protection design of buildings.

Contents of GB 50229-2019

1 General provisions 2 Terms 3 Fire hazard classifications, fire resistance classification and fire compartment of buildings (structures) of coal-fired power plant 4 General plane layout of coal-fired power plant area 5 Safe evacuation and structure of buildings (structures) of coal-fired power plant 5.1 Safe evacuation from main power house 5.2 Safe evacuation from other buildings (structures) 5.3 Building structure 6 Process system of coal-fired power plant 6.1 Coal transit system 6.2 Boiler pulverized coal system 6.3 Boiler air and flue gas system 6.4 Fuel oil system for ignition and combustion-supporting 6.5 Steam turbine generator unit 6.6 Diesel-generator system 6.7 Transformer and other electrical equipment with oil 6.8 Cable and cable laying 7 Fire water supply, extinguishing facilities and automatic fire alarm of coal-fired power plant 7.1 General requirements 7.2 Outdoor fire water supply 7.3 Indoor fire hydrant and indoor fire water supply volume 7.4 Indoor fire water pipe, hydrant and fire water tank 7.5 Water spray, water mist, automatic sprinkling and fixed fire monitor extinguishing system 7.6 Fire pump house and fire-fighting pool 7.7 Fire water drainage 7.8 Foam extinguishing system 7.9 Gas fire extinguishing system 7.10 Gas inerting system 7.11 Fire extinguisher 7.12 Fire fighting and rescue facilities 7.13 Automatic fire alarm and fire equipment control 8 Heating, ventilation and air conditioning of coal-fired power plant 8.1 Heating 8.2 Air conditioning 8.3 Ventilation for electronic equipment room 8.4 Oil system ventilation 8.5 Ventilation and de-dusting of coal transit system 8.6 Ventilation of other buildings 8.7 Smoke control and exhaust system 9 Fire power supply and lighting of coal-fired power plant 9.1 Fire power supply 9.2 Lighting 10 Gas turbine power plant 10.1 Fire hazard classifications and fire resistance classification of buildings (structures) 10.2 General layout of plant area 10.3 Fuel system 10.4 Fire protection requirements for gas turbine 10.5 Fire water supply, fixed fire extinguishing facilities and automatic fire alarm 10.6 Others 11 Substation 11.1 Fire hazard classification and fire resistance classifications, fire separation distance and firefighting roads of buildings (structures) 11.2 Safe evacuation and construction of buildings (structures) 11.3 Transformer and other electrical equipment with oil 11.4 Cable and cable laying 11.5 Fire water supply, fire extinguishing facilities and automatic fire alarm 11.6 Heating, ventilation and air conditioning 11.7 Fire power supply and emergency lighting Explanation of wording in this standard List of quoted standards